Fire-proof door or shutter



(No Model.) 2 Sheets-7Sheet 2.

H. S. SHUPELT. FIRE PROOF DOOR 0R SHUTTER.

No. 435,461. r Patented Sept. 2, 1890.

' UNITED STATES PATENT OFFICE.

HELEN S. SHUFELT, OF MINNEAPOLIS, MINNESOTA.

FIRE-PROOFDOOR OR SHUTTER.

SPECIFICATION forming part of Letters Patent No. 435,461, datedSeptember 2, 1890.

Application filed March 24, 1890.

To all whom it may concern.-

Be it known that I, HELEN S. SEUEELT, a

citizen of the United States, residing at Minneapolis, in the county ofHennepin and State of Minnesota, have invented certain new and usefulImprovements in Fire-Proof Doors or Shutters; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to an improvement in fire-proof doors or shuttersand the casings therefor. The frame'of the dooror shutter is preferablymade of galvanized malleable iron in two separate pieces of skeletonforrn'one for each side-while the panels are stamped out of galvanizediron or steel, and are properly secured between the sections oftheskeleton frames with their embossed or stampedup portions filling thespaces between the cross-bars. The frame and panels are securely clampedtogether by suitable bolts. The casing of the door or shutter is alsomade in sections of malleable iron, which are secured together and tothe framing by means of bolts; These sections are angular bars, one ofeach pair of which is provided with a shoulder having an inwardly-turnedlip. 'On this shoulder a strip of rubber or other suitable cushioningmaterial is placed and clamped in position by the edge of the otherangular piece. These rubber strips serve both as a packing to excludeair and also as buffers to cushion the shock of the door in closing.

In another and preferred form of my invention the door is made insections, as before noted; but the galvanized-iron panels are secured inits lower-portion only, the upper section being fitted with a wide panelof plateglass. Rabbets or shoulders are formed in each section of thedoor, and these are adapted to receive Wide protecting-plates of iron,which can be secured in place in any suitable way. In this form the ironplates can be readily placed in and removed from position i. e., atnight they can be placed in position by the janitor, who will removethem in the morning. I

In the accompanying drawings, in which like symbols of reference areplaced on like Serial No. 345,098. (No model.)

another form of my invention, and Fig. i is a longitudinal verticalsection thereof.

A is the frame of the door, made in two sections or a, each of skeletonform.

B B are panels struck-up out of galvanized iron. These panels are formedwith depressed portions 1) b and with extended sides W. The panels maybe formed in asingle integral sheet of iron, or they may be separate andindependent sections, as deemed most desirable. They are preferablyformed in a single integral sheet. In fitting the parts of the doortogether the panels are slipped under the bars of the skeleton-framewith their meeting edges b together. The sections of the door are thenplaced against each other and are secured in position by the bolts orscrews 0.

In order to produce a light as well as serviceable frame for the door,the side and end bars of the malleable-iron castings are made hollow orchannel shaped in cross-section.

In the form of the invention shown in Figs. 3 and 4 the malleable-ironcastings constituting the frame of thedoor are substantially the same asthose illustrated on Sheet 1, and the panels B B at the bottom are alsothe same as in the construction first described.

In lieu of the iron panels at the top of the door I substitute a widepanel of thick plateglass, which is suit-ably secured between the partsof the door-frame. Rabbets or offsets E are formed on the inner edges ofeach section of the door-frame.

F F are iron plates of a size and shape suitable to fit within therabbets E, and ff are turn-buttons for securing the plates F-F in place.In this form of door the advantages of a glass panel are secured, andthe panel can be readily protected by placing the plates F F on eachside thereof and properly securing them in position.

The casing of the door is made in two angular sections G G, which areplaced on each side of the framing II, and are secured thereto and toeach other by bolts h. The end of each section G is provided with awidened face having a curved lip g, and upon this face a longitudinalstrip of rubber I is placed and securely clamped in position by the edgeof the opposite section. The rubber strips act as butters to deaden thesound of the door in closing, and also as packing-strips to exclude theentrance of air. It is obvious that the frame and panels, and also thecasing, can be made of other fire-proof materials than those mentionedWithout departing from my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letter Patent, is-

1. A fire-proof door or shutter,in combination with a door-casingcomposed of two angular metallic bars, one of said bars provided with anextended face or shoulder and with a lip projecting therefrom, andabuifer secured between the bars, substantially as and for the purposespecified.

2. A fire-proof door composed of two sections of galvanized malleableiron, provided with rabbets around their edges, a glass panel securedbetween the sections, and protectingplates of metal adapted to besecured in the rabbets, substantially as and for the purpose specified.

3. A fire-proof door or shutter consisting of Y two skeleton frameshaving channel-shaped side and end bars, embossed sheet-metal panelshaving reduced portions 1) and extended edges 11 and means for securingthe sections of the door together, substantially as and for the purposespecified.

In testimony whereof I afiix mysignature in presence of two witnesses.

HELEN S. SHUFELT. Witnesses:

WM. H. Bnonenrr, Gnssrn HEINZ.

